Welt-guiding device for sewing-machines



. V 5 b 2 SheeltsQSheet 1.

P. w. MERRIGK. WELT GUIDING DEVICE FOR SEWING MACHINES. 7

(No Model.)

No. 550,750. P5551155 1D55;3',1s95.

(No Model.)

2 Sheets-Shea; 2. 1". W. MERRICK. WELT GUIDING. DE VIGE FOR SEWINGMAGHINBS. N0. 550,760.

Patented Dec. 3, 1895.

AN DREW EGRAHAM PHMQQ-UTNO. WASHINGTUNJIC.

UNIT STATES.

? PATENT OFFICE.

FRANK 1V. MERRICK, OF BOSTON, MASSACHUSETTS.

WELT-GUIDING DEVICEFOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 550,760, dated December3, 1895. Application filed March 9, 1894. Serial No. 503,007- (Nomodel.)

To all whom it may concern.-

Be it known that I, FRANK W. MERRIOK, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Sewing-Machines, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

My invention is particularly designed for use in connection withsewing-machines which are employed forsewing seams containing a welt. Itis customary in making such seams to employ a welt which is prepared inthe form of a continuous strip-that is to say, of some considerablelength-and after two pieces of material intended to constitute parts ofa boot or shoe or the like have been passed through the machine andunited thereby with the welt between them it is usual to success ivelypass through and similarly unite other pieces of material, thesuccessive pieces be ing connected together by the intermediate portionsof the we1ting-strip, which are subsequently severed. When one of thesaid intermediate portions of the welting-strip is presented to thestitching devices, it, being flexible and yielding, becomes forced intothe usual elongated hole or slot in the throat plate by the action ofthe said stitching devices, and it frequently happens that the stripbecomes packed and jammed into the said slot so tightly that it has tobe driven out by a suitable tool.

My invention has for its object to remedy this disadvantage; and itconsists, accordin gly, in a throat-plate having the slot therein of theimproved character hereinafter specified, and whereby the withdrawal ofthe welting-strip therefrom is facilitated and jamming is obviated.

In the drawings, Figure 1 is a view in end elevation of part of awax-thread sewing-machine having my invention applied thereto. Fig. 2 isa view in plan of the work rest and parts applied thereto. Fig. 3 is aview, detached, of a throat-plate embodying my invention. Fig. 4 is aView showing the usual form of tl1roat-plate.

At 1 is the base of the machine. At 2 is the post thereof. At 3 is thework-rest, consisting of a plate mounted on the upper end of the saidpost. At 1 is the needle-bar. At 5 is the needle. At 6 is the cast-offbar, at the upper end of which the cast-off is mounted, as 5 5 usual. At'7 is the aWl-bar. At 8 is the awl.

At 9 is the thread-carrier. At 10 is the presserfoot, and at 11 is thescam-guide, which last is held adjustably to the upper surface of thework-rest by screws 12 12, passing through slots 13 13 in the shank ofthe same. The construction and operation of these parts are or may be asdesired or usual.

At 14: is the welt-guide, it being made in one piece and beingseamless,hollow, and elliptical in cross-section. It is secured to thefree end of a swinging arm 15, which latter at its rear end is mountedpivotallybetween center screws 16 16, passing through lugs 17 17 on asupporting-plate 18, the said supportingplate 18 being secured to thework-rest 3 by means of screws 19 19, passing through slots 20 20,formed in the supporting-plate and being capable ofadjustment, so as toplace the free end of the welt-guide in the desired position relativelyto the line of feed.

At 21 is the throat-plate, and at 22 is the slot made through the samefor the passage of the needle, (to.

Heretofore the slot 22 in the throat-plate has been a simple straightslot of uniform width from end to end thereof, and when the weltstriphas become packed and jammed into the same so as to fill it thenecessity has heretofore existed of arresting the machine and drivingout the accumulation by means of a suitable punch or tool applied frombelow.

I form the said slot with an enlargement 221 at the outer end thereofand preferably bevel off the forward side of the enlargement, as in- 0dicated at 222 in Figs. 2 and 3. As will be obvious, when the work isdrawn along in the direction of the feed such portions of the weltingstrip as may become carried down into the slot 22 will be fed forward bythe action of the 9 5 machine readily until they reach the enlargement221,when they will at once become freed, and then will pass out withoutdifficulty.

The beveled or inclined surface at the outer for the release anddischarge of the Welt-strip, IO side of the enlargement facilitate'stlieniovesubstantially as described. ment of the Welt out of the slot as theWork In testimony whereof I affix my signature passes along. ,inpresence of tWo Witnesses. 5 I claim as my invention- L The combinationwith a Weltguide and g FRANK WV. MERRICK.

the stitching devices of a sewing machine, of Witnesses the throat-platehaving the slot therein made WM. A. MAOLEOD,

with an enlargement at the outer end thereof CHAS. F. R-ANDADL.

